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Style PSC Polyurethane Double-Acting Piston Seal, 3.00 Inch Bore Diameter, 2.62 Inch Groove Diameter, Inch Groove Width

Description & Features

Designed for double-acting hydraulic cylinders with a 3.00-inch bore, the Style PSC Polyurethane Double-Acting Piston Seal provides reliable bidirectional sealing across a pressure range of 0 to 5,000 PSI. The seal fits a 2.624-inch groove diameter and is constructed from 95A polyurethane with a 70A nitrile energizer, combining abrasion resistance with consistent radial force across the sealing contact area.

The operating temperature range spans -65°F to 220°F, making it suitable for a wide variety of hydraulic cylinder applications in industrial and mobile equipment. Groove width and piston diameter tolerances are tightly controlled, supporting precise fit and long service life in standard hydraulic cylinder bores.

SKU: PSC-334

Supplier Part Number (MPN): PSC-334

Alternate Part Numbers: C1KM97, MI-01037536, MINO-00407X30166

Specifications

Bore 3	Bore Tolerance (in) +0.002/-0	Brand Hercules Sealing Products	Brand Hercules Sealing Products	Pack Size 1.00	UOM EA	Groove Dia. E 2.62	Groove Width Tolerance (in) +0.005 / -0	Piston Dia. F 3.00	Piston Dia. Tolerance (in) +0/-0.004	Seal Height B 0.26	Supplier Part Number PSC-334	Alternate Part Numbers Alternate Part Number C1KM97, Alternate Part Number MI-01037536, Alternate Part Number MINO-00407X30166	Product Weight 0.02 lbs

Similar Products

Model Number	Bore	Seal Height B	Groove Dia. E	Piston Dia. F	Bore Tolerance (in)	Groove Width Tolerance (in)	Piston Dia. Tolerance (in)
PSC-218 Double-Acting Piston Seal	1.5	0.15	1.254	1.498	+0.002/-0	+0.005 / -0	+0/-0.002
PSC-218-WB Double-Acting Piston Seal	1.5	0.265	1.254	1.498	+0.002/-0	+0.005 / -0	+0/-0.002
PSC-326 Double-Acting Piston Seal	2	0.255	1.625	1.998	+0.002/-0	+0.005 / -0	+0/-0.002
PSC-326-WB Double-Acting Piston Seal	2	0.37	1.625	1.998	+0.002/-0	+0.005 / -0	+0/-0.002
PSC-330 Double-Acting Piston Seal	2.5	0.255	2.125	2.498	+0.002/-0	+0.005 / -0	+0/-0.002
PSC-334 Double-Acting Piston Seal	3	0.255	2.624	2.997	+0.002/-0	+0.005 / -0	+0/-0.004
PSC-334-WB Double-Acting Piston Seal	3	0.37	2.624	2.997	+0.004/-0	+0.005 / -0	+0/-0.004
PSC-338 Double-Acting Piston Seal	3.5	0.255	3.125	3.498	+0.004/-0	+0.005 / -0	+0/-0.004
PSC-342 Double-Acting Piston Seal	4	0.255	3.625	3.998	+0.004/-0	+0.005 / -0	+0/-0.004
PSC-342-WB Double-Acting Piston Seal	4	0.37	3.625	3.998	+0.004/-0	+0.005 / -0	+0/-0.004
PSC-350 Double-Acting Piston Seal	5	0.255	4.636	4.999	+0.004/-0	+0.005 / -0	+0/-0.004
PSC-433-WB Double-Acting Piston Seal	6	0.5	5.521	5.999	+0.004/-0	+0.006 / -0	+0/-0.004

Product Questions & Answers (3)

Question by: Brett T on Jan 22, 2026, 6:13 AM

Got a 3-inch bore cylinder on a piece of equipment and need to know if this seal will hold up to full system pressure. What's the rated pressure on it?

Answer by: Customer Support on Jan 23, 2026, 7:25 AM

Rated for 0 to 5,000 PSI, so it covers the full working range of most standard hydraulic systems without issue. The seal body is 95A polyurethane, which handles pressure-induced deformation a lot better than softer compounds, and the 70A nitrile energizer keeps consistent radial force on the sealing surface throughout that range. For a 3.00-inch bore cylinder, the piston diameter it's built around is 2.997 inches, so fit is tight and controlled right out of the box.

Question by: Cody W on Oct 17, 2025, 2:43 PM

What size groove does this seal fit into? Just want to make sure it's right before I order.

Answer by: Customer Support on Oct 18, 2025, 3:14 PM

The groove diameter this seal is designed for is 2.624 inches.

Question by: Rod B on Jul 11, 2025, 4:13 PM

got a 3 inch bore cylinder, is this PSC-334 the right piston seal size for it?

Answer by: Customer Support on Jul 12, 2025, 5:56 PM

For a 3.00 inch bore double acting hydraulic cylinder, PSC-334 matches that bore size and is meant to run in a 2.624 inch groove diameter. The piston diameter “F” dimension is 2.997 inches with a +0/-0.004 tolerance, and the bore tolerance shown is +0.002/-0, so it’s set up for a precise fit in standard 3 inch cylinder bores.